Questions: Which term refers to a synapse that releases acetylcholine from the presynaptic axon terminal? Cholinergic Serotonergic Adrenergic Electrical
Transcript text: Which term refers to a synapse that releases acetylcholine from the presynaptic axon terminal?
Cholinergic
Serotonergic
Adrenergic
Electrical
Solution
The answer is the first one (or A): Cholinergic.
Explanation for each option:
Cholinergic: This term refers to synapses that release acetylcholine from the presynaptic axon terminal. Acetylcholine is a neurotransmitter involved in many functions including muscle activation and memory.
Serotonergic: This term refers to synapses that release serotonin, a neurotransmitter involved in mood regulation, sleep, and other functions. It is not related to acetylcholine.
Adrenergic: This term refers to synapses that release norepinephrine (noradrenaline) or epinephrine (adrenaline). These neurotransmitters are involved in the fight-or-flight response and are not related to acetylcholine.
Electrical: This term refers to synapses that transmit signals through direct electrical connections between neurons, known as gap junctions. This is a different mechanism from chemical synapses that release neurotransmitters like acetylcholine.
Summary:
The term that refers to a synapse that releases acetylcholine from the presynaptic axon terminal is "Cholinergic."